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UID:DSC-13903
DTSTART;TZID=Europe/Berlin:20180126T100000
SEQUENCE:1516953628
TRANSP:OPAQUE
DTEND;TZID=Europe/Berlin:20180126T110000
URL:https://www.dresden-science-calendar.de/calendar/de/detail/13903
LOCATION:IFW\, Helmholtzstraße 2001069 Dresden
SUMMARY:Alvertis: Tensor Network Simulation of Open Quantum Dynamics: a cas
 e study of singlet exciton fission
CLASS:PUBLIC
DESCRIPTION:Speaker: Antonis Alvertis\nInstitute of Speaker: Centre for Sci
 entific Computing\, Cavendish Laboratory\, University of Cambridge \nTopic
 s:\nMaterialien\, Physik\n Location:\n  Name: IFW (A2E.30\, IFW Dresden)\n
   Street: Helmholtzstraße 20\n  City: 01069 Dresden\n  Phone: \n  Fax: \n
 Description: Electronic processes in organic materials are strongly couple
 d to vibrational motion\, effectively resembling the dynamics of an open e
 lectronic system in contact with its normal mode environment. The strong v
 ibronic couplings make perturbative approaches for treating the quantum dy
 namics in such cases inadequate\, highlighting the need for a more high-le
 vel approach that can handle the explicit dynamics of the environment and 
 emerging quantum correlations between it and the electronic sub-system. In
  the specific work\, the time-dependent variational principle is applied t
 o a novel many-body wave function expanded into a tree tensor network stat
 e containing entanglement renormalisation nodes\, which allows an explicit
  treatment of vibrational effects and provides access to the corresponding
  observable quantities. The outlined methodology is applied to the organic
  molecule DT-Mes which exhibits ultra-fast singlet exciton fission: a proc
 ess during which a singlet excited state spontaneously generates two tripl
 ets localised on different molecules\, and has the potential to increase t
 he efficiency of solar cells based on organic semiconductors. The results 
 reveal ultra-fast singlet exciton fission from a higher lying singlet stat
 e\, leading to the conclusion that the criterion E(S1) > 2 E(T1) for fissi
 on may not be as important as previously thought.  .
DTSTAMP:20260521T085237Z
CREATED:20171213T080249Z
LAST-MODIFIED:20180126T080028Z
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